This one may look more complicated than Pandora's,but it turns out "beautifully simple"!

Code:

A
F
E
D
B C

Area of triangle ABC is 13824 square feet. The length of line segment BD is 4/15 of line segment AB. The length of line segment CE is 5/12 of line segment AC. The length of line segment AF is 3/20 of line segment AB. What is the area of triangle DEF?